For some odd reason, I've noticed a no. of Tiger users have had problems with dmg files. I can send you a copy of the installer in SIT format which would mean no dmg, just uncompressing the archive using StuffIt Expander & then double-clicking the installer.

I can't believe you're using version 2. That's not only bad for the gnutella network but I'm surprised it even works now (many gnutella program clients will automatically block out the earlier versions!)