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For people who still have issues with modified inf file
Hello All,
I am one of the ones who still have problems even browsing through tons of forums and trying every version of INF file out there. I'm using Vista that came with a Dell 1720
As I tweaked my vista, and read the device install logs, it appears that for whatever reason, my copy of the mdmcpq.inf is different than what everyone else has; hence the actual copying of the file usbser.sys won't work.
I figured out how to fix it. I hope this helps others who're having this problem. No warranty is provided to these steps, use it at your own risk.
1. Make a backup folder in your computer; I made a c:\backup
2. go to C:\Windows\inf
3. copy mdmcpq.inf and mdmcpq.pnf to c:\backup. Rollback the files from here if this doesn't work for you.
4. DELETE mdmcpq.pnf from c:\windows\inf
5. copy mdmcpq.inf to a temp folder; say c:\temp
6. inside c:\temp; open mdmcpq.inf using "open with..." context menu, select notepad to edit.
(you need to do this because windows won't let you directly notepad-edit files in the c:\windows\inf folder)
7. in the file, look for:
[FakeModemCopyFileSection]
usbser.sys,,,0x20
and comment out the line with usbser.sys, so it ends up looking like this:
[FakeModemCopyFileSection]
;usbser.sys,,,0x20
Save the modified mdmcpq.inf
8. copy the modified mdmcpq.inf back into c:\windows\inf folder. Need admin approvals for this.
9. If you have the original Sprint PCS PPC-6700 INF files, do the same edit to the PPC6700SP by Sprint.INF (or download this from the zip file I'm going to attach to this message); you'll also need to add in the include=mdmcpq.inf sections as mentioned in this forum.
10. Since you've now removed/commented out the installation file copy of usbser.sys; you'll have the perform that yourself.
11. Search for usbser.sys from your windows folder, you should find one. Mine is at C:\windows\system32\DriverStore\FileRepository\mdmcpq.inf_925c8686 , but yours may be at a different folder.
12. copy this usbser.sys into C:\windows\system32\drivers
13. Now follow the original installation instruction provided in this forum:
a. open wmodem in your ppc6700, select usb and click start
b. plug in ppc6700 to pc's usb port
c. let vista install and screw it up; end up with a generic serial
d. open device manager; right click on generic serial
e. try to update driver; then select your "edited" "PPC6700SP by Sprint.INF"
f. the driver should install ok now (this is the step that always eluded me)
g. Now go to control panel: network and internet: network and sharing center: (side nav) setup a connection or network; then select new dial up connection; then enter #777 for numberl; leave user and password blank. When you're done, you have your own PPC as modem usb link!
I hope this helps everyone.
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