I have been looking everywhere for this and I have only found the original one.

This?

http://www.moetron.com/2006/07/21/makai-senki-disgaea-2-arrange-soundtrack/

I tried this one before, but whn i tried to open the files inside it wouldnt

i mean tht only som of the files open for me

i mean tht only som of the files open for me

Try downloading Japanese text suport, or renaming the files that won't open, if you can. Non-jap versions of windows HATE anything with non-roman characters in the filenames or file-information. It works fine for me and I have Jap text suppoert so that may be the problem. 90% of the included files are in Japaneese so they'll %$*% up window's filesystem sometimes.
I don't know if it works the same way with Mac or Linux, but the text pack should fix the problem.

Oh, and thanks to Dark_Dragon943 for the link. Sinful Rose = win.

thanks for the link ~