thanks for the really fast reply, but no it's not what i'm looking for. what i meant was, i can change the way windows xp recognise the file types by simply adding a ".xxx" extension behind the name of the file.
for example, "Reason.mpc" can't be recognised by windows and can't be autoplayed and such, but all i have to do is add a ".mp3", instead of being "Reason.mp3.mpc" it'll automatically change into "Reason.mp3", an mp3 file.
now though i can't do that anymore. it'll just become "Reason.mp3" as the name, but still an ".mpc" file.
erm... hope i'm clear enough. thanks again
edit: found out how to do it. just in case anyone will need to know in the future...
Folder Options > View> untick "Hide Extensions For Known File Types"> Apply.
after that you can just rename the extension of your file and change the way WinXP reads it. sometimes might render file unusable tho so be careful.
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