mouser, WinAmp uses its own set of cursors. If you look under %WinAmp%/Skins/NameOfSkin/ there should be a bunch of ".cur" files... those are the cursors... if there isn't then it the cursors default to the WinAmp basic ones...
To make the Cursors bigger you coud just copy a big cursor file you want into to the Skin directory of your choosing... "Normal.cur" is the normal one... but there are so many differnet ones that it would take time to replace all of them... Maybe there is a skin with big ones aready.. If not, maybe I'll make a bunch of cursors for the IO... but i don't have the time now...
If you wanna do it, you can use any Cursor Creator (Visual Basic comes with a nice one)... or Windows comes with a fine set of large cursors that you could use... I think the max Cursor size is either 32x32 or 48x48... someone correct me if i'm wrong... if i make them I'll post a link (I prolly will, because I'm bored like that)