ChannelVision filter question & is this all parts needed to dist HTPC output?

[IVB]

Read lots of posts, esp lots of RichA posts. Got the whole HTPC thing setup, recording shows, now I need to distribute it. I can either distribute VGA cable to all TVs, then convert to sVideo & send to TV or modulate. I'll only be doing TV, and non-HDTV at that.

Note: I live in Oakland, with standard analog cable from 2->60, digital cable from 120->591.

If I go down the modulation route, then I think I need to buy:
1) ChannelVision E-1200 modulator: To modulate input to a particular channel. I was thinking 90 since it's a long way from 60, which is my high channel.
2) ChannelVision 3102-78 filter: To block out upper channels
3) ChannelVision HS-3 combiner

Q2: Will that 3102-78 block out my digital cable channels above 78? Or just the analog, of which I have none.

Q3: Due to low-power signal from the cable company, I currently have the inbound cable go through a RadioShack 4-way amp&splitter, with 1 run to my HTPC. Should I also get a powered 2-way splitter, and run from:
Cable Company drop->
- HTPC
- Combiner which would also have the HTPC->filter->modulator line coming in.

Combiner would then go to 4-way splitter for distribution to TVs around house.

Is this right?