@CypherBit
Great to hear that it works fine - you've literally put up a mini-howto on reducing nero install in the post above.

As for the files deletion thing, I'd expect that replacing (with 0-byte files) any other files than the below on XPSP2 US-English should cause problems (like it did when you removed OCX'es):
QUOTE
Nero\Common Files\AudioPlugins\mp3PRO_dmo.dll (68,00 KB)
Nero\Nero BackItUp\BackItUp-Deu.nls (344,00 KB)
Nero\Nero BackItUp\NBJ-Deu.nls (80,00 KB)
Nero\Nero BackItUp\NBR-Deu.nls (68,00 KB)
Nero\nero soundtrax\SoundTrax-Deu.nls (740,00 KB)
Nero\Nero\DosBootimage.IMA (1,41 MB)
Nero\Nero\nerocd95.vxd (38,95 KB)
Nero\Nero\Nerodeu.nls (5,68 MB)
Nero\Nero\Nerodeu.txt (42,22 KB)
Nero\Nero\nres_dan.msg (14,11 KB)
Nero\Nero\nres_deu.msg (16,15 KB)
Nero\Nero\nres_esp.msg (15,65 KB)
Nero\Nero\nres_fin.msg (14,58 KB)
Nero\Nero\nres_fra.msg (16,26 KB)
Nero\Nero\nres_hun.msg (15,15 KB)
Nero\Nero\nres_ita.msg (15,01 KB)
Nero\Nero\nres_jpn.msg (14,27 KB)
Nero\Nero\nres_nld.msg (14,84 KB)
Nero\Nero\nres_nor.msg (14,12 KB)
Nero\Nero\nres_ptg.msg (15,99 KB)
Nero\Nero\nres_rus.msg (14,23 KB)
Nero\Nero\nres_sve.msg (14,83 KB)
Nero\Nero\nres_trk.msg (14,08 KB)
Nero\Nero Wave Editor\waveedit-deu.nls
Nero\Nero Wave Editor\vplugins-deu.nls
Nero\CoverDesigner\covered-deu.nls
Nero\setup\Eula_chs.txt (10,08 KB)
Nero\setup\Eula_cht.txt (10,76 KB)
Nero\setup\Eula_deu.txt (21,94 KB)
Nero\setup\Eula_esp.txt (16,88 KB)
Nero\setup\Eula_fra.txt (17,56 KB)
Nero\setup\Eula_ita.txt (17,85 KB)
Nero\setup\Eula_jpn.txt (13,61 KB)
Nero\setup\Eula_kor.txt (12,78 KB)
Nero\setup\Eula_nld.txt (17,58 KB)
Nero\setup\Eula_ptg.txt (18,07 KB)
Nero\setup\Eula_sve.txt (16,21 KB)
[the particular set of files below is highly variable - check if your windows installation already has these files or newer versions before deleting]Nero\Redist\50comupd.exe (498,03 KB)
Nero\Redist\gdiplus.DLL (1,63 MB)
Nero\Redist\mfc42.DLL (972,05 KB)
Nero\Redist\MSVCP60.DLL (392,05 KB)
Nero\Redist\msvcrt.dll (284,05 KB)
Nero\Redist\shfolder.exe (114,54 KB)
In plain language (for everybody), the list above is about files safe to delete from the installer (but your mileage may vary

). As is clear from cypherbit's How-To (in the post above), the maximum benefit (and least loss) is from cleaning out the Redist folder.