i dont suggest you try installing an RPM on this machine cause its a ubuntu ( debian linux) based machine.Alisa will convert the file but its possiable that it wont be very stable.Try findieng a debian based package the ones that have a .deb as their extension
and if you need a program like limewire there are tonz out there.Its highly probable that your looking for something like books etc. try these other programs
1) Mldonkey. (eDonkey, Soulseek, Fasttrack, Gnutella, Open Napster, Direct Connect, BitTorrent)
2) LimeWire. (Gnutella)
3) Lopster. (OpenNAP)
4) Gnapster. (OpenNAP)
5) eDonkey. (eDonkey) [Prop]
6) cDonkey. (eDonkey)
7) Gift client / server / fasttrack plugin (Fasttrack)
9) Gtk-Gnutella. (Gnutella)
10) Qtella. (Gnutella)
11) Mutella. (Gnutella, console)
13) Freenet. (fully anonymous p2p)
15) Lmule. (eDonkey)
16) Xmule. (eDonkey)
18) PySoulSeek (Soulseek).
19) Loophole. (WinMX) [Prop]
20) Direct Connect.
21) QuickDC. (Direct Connect).
24) GrapeWine. (fully anonymous p2p)
25) Snark. (Bittorrent)
i would'nt sugges that you install them but its upto ya
tc have a nice day