You bet. I hope to help you out.
Background: We have a 7 desktop office with a 3 year old server running MS Server 2003. Server name is GMV2003-1. Each desktop has its own unshared drive(p: - t

on the server, plus there is a shared drive(z

for the sharing of documents and drive (k

is the shared Accounting drive which only contains ACCPAC folders including the data folder. The path to the shared data for ACCPAC is \\gmv2003-1\Accounting\Accpac for an install on all pre-Windows 7 machines.
After installing ACCPAC on the Windows 7 machine and getting the same rlzrun30.rts error that you received when trying to open batch list windows, this is what eventually worked:
- I opened up a virtual xp session
- mapped the network drive (I used y: and mapped to \\gmv2003-1\Accounting\Accpac.
- Installed ACCPAC System Manager disk and put into the fields:
PROGRAM FILES - C:\Program Files\Accpac
TOOLS - C:\ca-apps
DATA - y:
- Installed all other ACCPAC modules
- shutdown xp session and reopened since boot path had been modified by install.
- Prior to trying to open ACCPAC, I have to open MY COMPUTER where the original K:ACCOUNTING drive is listed under the subsection OTHER DRIVES and its property is a \tsclient\, but under the subsection NETWORK DRIVES is the MAPPED Y: drive, which is the same folder as the k:. I have to double click the y: drive as if to open it to explore and at that time it asks me for an adminstrator password to be able to open it(I think this is because I am logged onto the desktop as the girl who uses that computer but she does not have full administrative priveleges so the XP session needs permission to open that y: drive.) After opening the y: drive with the adminitrator password, I can close it along with MY COMPUTER and then open ACCPAC normally.
Can now open A/R invoice, receipt, and adjustment batch listings like normal and everything in ACCPAC works.
I hope that helps.