官方试用版下载:
Master Collection
http://trials.adobe.com/Applications/MastCol/CS4/Win/ADBESTAMCS4_LS1.exe
http://trials.adobe.com/Applications/MastCol/CS4/Win/ADBESTAMCS4_LS1.7z

Design Premium
http://trials.adobe.com/Applications/DesignPre/CS4/Win/ADBESTDSCS4_LS1.exe
http://trials.adobe.com/Applications/DesignPre/CS4/Win/ADBESTDSCS4_LS1.7z

Web Premium
http://trials.adobe.com/Applications/WebPre/CS4/Win/ADBESTWDCS4_LS1.exe
http://trials.adobe.com/Applications/WebPre/CS4/Win/ADBESTWDCS4_LS1.7z

Photoshop CS4
http://trials.adobe.com/Applications/Photoshop/CS4/Win/ADBEPHSPCS4_LS1.exe
http://trials.adobe.com/Applications/Photoshop/CS4/Win/ADBEPHSPCS4_LS1.7z

Illustrator CS4
http://trials.adobe.com/Applications/Illustrator/CS4/Win/ADBEILSTCS4_LS1.exe
http://trials.adobe.com/Applications/Illustrator/CS4/Win/ADBEILSTCS4_LS1.7z

InDesign CS4
http://trials.adobe.com/Applications/InDesign/CS4/Win/ADBEIDSNCS4_LS1.exe
http://trials.adobe.com/Applications/InDesign/CS4/Win/ADBEIDSNCS4_LS1.7z

InCopy CS4
http://trials.adobe.com/Applications/InCopy/CS4/Win/ADBEAICYCS4_LS1.7z
http://trials.adobe.com/Applications/InCopy/CS4/Win/ADBEAICYCS4_LS1.exe

Fireworks CS4
http://trials.adobe.com/Applications/Fireworks/CS4/Win/ADBEFWKSCS4_LS1.exe
http://trials.adobe.com/Applications/Fireworks/CS4/Win/ADBEFWKSCS4_LS1.7z

After Effects CS4
http://trials.adobe.com/Applications/AfterEffects/CS4/Win/ADBEAFETCS4_LS7.7z
http://trials.adobe.com/Applications/AfterEffects/CS4/Win/ADBEAFETCS4_LS7.exe

PremierePro CS4
http://trials.adobe.com/Applications/PremierePro/CS4/Win/ADBEPPROCS4_LS7.7z
http://trials.adobe.com/Applications/PremierePro/CS4/Win/ADBEPPROCS4_LS7.exe

Dreamweaver CS4
http://trials.adobe.com/Applications/Dreamweaver/CS4/Win/ADBEDRWVCS4_LS1.exe
http://trials.adobe.com/Applications/Dreamweaver/CS4/Win/ADBEDRWVCS4_LS1.7z

After Effects Content
http://trials.adobe.com/Applications/AfterEffects/CS4/Win/ADBEAFETCS4_Cont_LS7.exe
http://trials.adobe.com/Applications/AfterEffects/CS4/Win/ADBEAFETCS4_Cont_LS7.7z

Premiere Content
http://trials.adobe.com/Applications/PremierePro/CS4/Win/ADBEPPROCS4_Cont_LS7.exe
http://trials.adobe.com/Applications/PremierePro/CS4/Win/ADBEPPROCS4_Cont_LS7.7z

Photoshop Extended Content
http://trials.adobe.com/Applications/Photoshop/CS4/Win/PHSPCS4_Cont_LS1.exe
http://trials.adobe.com/Applications/Photoshop/CS4/Win/PHSPCS4_Cont_LS1.7z (not working)

and finaly:
Details for ADOBE CREATIVE SUITE CS4 PRODUCTION PREMIUM
http://www.demonoid.com/files/details/1655690/390220/
including...
"ADBEAFETCS4_Cont_LS7.exe" - After Effects Content
"ADBEFLPRCS4Win_Cont_LS1.exe" - Flash Professional Extras
"ADBEPPROCS4_Cont_LS7.exe" - Premiere Pro Content
"ADBESTVDCS4_LS7.exe" - Production Premium
"HSPCS4_Cont_LS1.exe" - Photoshop Content
"STVDCS4_Cont_LS7.exe" - Production Premium Content

Flash Pro CS4
http://trials.adobe.com/Applications/FlashPro/CS4/Win/ADBEFLPRCS4Win_LS1.exe
http://trials.adobe.com/Applications/FlashPro/CS4/Win/ADBEFLPRCS4Win_LS1.7z

Flash Pro Content
http://trials.adobe.com/Applications/FlashPro/CS4/Win/ADBEFLPRCS4Win_Cont_LS1.exe
http://trials.adobe.com/Applications/FlashPro/CS4/Win/ADBEFLPRCS4Win_Cont_LS1.7z (not working)

Production Premium CS4
http://trials.adobe.com/Applications/ProdPrem/CS4/Win/ADBESTVDCS4_LS7.exe
http://trials.adobe.com/Applications/ProdPrem/CS4/Win/ADBESTVDCS4_LS7.7z

http://trials.adobe.com/Applications/Photoshop/CS4/Win/PHSPCS4_Cont_LS1.7z (not working)
http://trials.adobe.com/Applications/Photoshop/CS4/Win/PHSPCS4_Cont_LS1.7z (not working)

下载方法 Download method:
1) 访问Adobe 官方网站
2) 选择 Download -> Trials
3) 任选一个不是CS4的下载，如: Lightroom 2等等
4) 登录你的帐号 (如果没有请注册一个，免费的)
5) 拷贝以上下载链接到游览器中，Enter～
6) Ok～可以下载了 (推荐：先之前打开下载软件如Orbit Downloader)

Master 和 premium我亲测可以下载。
不过 Master Collection 我试了好多次才可以下载。如果遇到问题，请在不同时段试试看～