Update.
You need Programmer for KRD jaguar. you will need to enter frequencies into respective talkgroups.
What I found for Montgumery county, you won't use on the 700P.
The only 700/800 Mhz systems are now P25. everything else is VHF conventinal. No EDACS systems.
Best bet is dump the 700P and invest in a cheap VHF radio, maybe a P7100.
You can still use the same software for that. Frequencies to program are here:
Scanner Frequencies and Radio Frequency Reference for Montgomery County, Texas (TX)
www.radioreference.com
Not that any are still used.