I'm not near my computer with win93 on it but I can start a little instructional blurp:
On the "Channels" tab (I believe it's "Channels") you will see 10 "pages" (0-9) that correspond to your scanning banks. For a trunked system you will need to do multiple steps:
First, change the mode from Conv--->EDACS--->Moto (I think those are your only 3 choices in the drop down). For the HCRRS TRS you will select "Moto" (or maybe MOT).
Second, you will program the actual trunking frequencies (in order) down the column. Skip the first line (00 I think; this might only be mandatory for EDACS systems BUT it won't hurt for MOTO either- until someone else clarifies or I get back to my house to check). Program the site's frequencies in order making sure to change each frequency's mode to "MOT." After you programmed in your trunking frequencies you have two options:
1. Scan in "open" mode for any talkgroup to use that site (not recommended- this is a busy system and will overcrowd your memory quick).
2. Scan in "closed" mode. This means it will only pickup the talkgroups you programmed in to the scanner and ignores what is not programmed. Within the listening bank (0-9) you have 5 sub-banks on trunking systems (don't apply to conventional). Within this sub-bank you can program specific agencies and turn them on/off individually within the bank:
Example: If you have the "Clodine" site (near Katy) programmed in on Bank 1, you can assign Fort Bend SO to sub-bank 1, KatyPD to sub-bank 2, KatyFD to sub-bank 3 and so on (this allows you more flexibility/selectivity in monitoring).
Third, programming talkgroups: check out the little box in the lower right hand corner. You should have a "Tag," "ID" and "L/O" (and maybe "Delay"). Program each you want to hear (or lockout) in this box, and use the hexadecimal/decimal value you see in the RR database (make sure the one you input is correlating with the hex/dec slection box in win93). For an EDACS trunk system it might allow AFS format (but for uniformity's sake I always use decimal- the easiest).
This should get you going until I can get back to home and take a screenshot- in the meantime someone else might cover it.