The config.sys loads HIMEM.SYS but the rest of the entries in both config.sys and autoexec.bat do not appear to use it at all.
In Config.sys, try replacing DEVICE= with DEVICEHIGH= for the three .DOS drivers and see whether this completes without errors. (This is generally a try it and see manoever for each entry).
In autoexec.bat, try replacing
\net\netbind.com with LH \net\netbind.com
and also
if exist MOUSE.COM LH MOUSE.COM (LH=LoadHigh)
Again, this is a try and test approach as not all drivers will allow themselves to be loaded into high memory, but at least if some of them do, it leaves more base memory available for the other drivers to load. You can also try putting a REM at the beginning of the: if exist mouse.com, etc line, as some mouse drivers can cause issues as well.
What version of PC DOS are you working with by the way?
Finally, you may be interested in this article on how to build a WinPE V3 boot environment for use with Ghost: https://www-secure.symantec.com/connect/articles/creating-and-using-winpe31-image-gss-251
This version allows you to use Win 7 drivers.
Users have reported that imaging with PCDOS appears to have a limit of around 24-26Gb on the raw image size so you may have issues if imaging a large Win 7 install.