[Samba] Upgrade to 3.0.14??

[Kevin B]

Hellp
I have a simple RH9 samba server running samba 2.2.12 from fedoralegacy.org.
They have a 5 user Quickbooks company file that's 200mb.
They complain opening the file is getting slower [obviously] as they
add more data and the file grows.
If I upgrade samba to 3.0.14 will that help with performance?
The LAN is 100mbps and the server is Dell P3-2.2 with 640ram
and scsi drives in Raid1 [perc3].

TIA
Kevin