If your owning an SCPH-700XX (v12/13) you can consider to use an internal HDD IDE connection which is much faster than USB HDD and more games are compatible.
If your living near a volunteer you can use the free FMCB installation service found here:
Originally Posted by masaydo
Slim PS2 SCPH-70004 (v13) w/ FMCB, 3x Sony 8MB, 1x MaxMemory 16MB (Backup card)
I'm not available for FMCB installation service until I can guarantee a processing time of a few days again, sorry.