Software Deployment

hi to all,
I've a big problem, with distribution SAPGUI 6.40 on my slow secondary sites.
I'va created my package with SAPADMIN.exe on server1\sapinst (share).
On Primary SMS server was created a package with this configuration:
Package Properties
Data source :
\\server1\sapinst
Program Properties
Setupunattended
command-line: setup\sapsetup.exe /p:"{942B9051-3459-4466-A0E9-0F8FA8E4108F}" /sms /force /NoDlg
and I've replicated this package to all remote distribution servers sms on slow sites.
But when I attempt to distribute SAP on a slow site, distribution start but source is \\server1\sapinst, and the installation is very very slow.
I've found that in sapsetup.cfg is mentioned a dsserver and instserver:

[SAPInstallerSvcFiles]
sapfeiis.exe=SAPSetup Installer Service
sapfeilg.dll=SAPSetup Logging Facility
sapsetup.cfg=SAPSetup Configuration File

[SAPDistribSvcFiles]
sapfeiKr.dll=SAPSetup Installer Kernel
sapfeids.exe=SAPSetup Distribution Service
sapfeilg.dll=SAPSetup Logging Facility
sapfeiut.dll=SAPSetup Utilities Library
sapsetup.cfg=SAPSetup Configuration File

[Proxies]
netsetup.exe=/p
admsetup.exe=/server
setup.exe=%1

[Trace]
Level=3
MaxLogSize=8192

[General]
InstServer=\\server1\sapinst
DsServer=server1

if I delete these lines, installation on clients fail, in sapsetup.log appear that cannot find dsserver.
what can I do to get local distribution server on slow sites?

Thanks
gianluca