Back then they told me that they didn't have any HD-STBs. Only the HD DVRs. That's why I gave back the HMDVR.
But now, I called up the department, asked if they have HD-STBs. They said yes, for $5.99 a month. I am having them send me 2 of those, and I will be sending back my 2 HD-DVRs that are costing me $12.99 a month.
So, right now, I'll be saving $14 a month, and once the HMDVR promo expires (free for 90 days), I'll just keep it for the extra $4 it'll end up costing me.
Thanks to everyone here for all your help. I really appreciate it!!!