asterisk users - Sep 2005 - 2 X100P and SIP outbound routing

Current setup

2 x X100P cards connected to 2 analogue lines
Using prefix 7 and 8 before number
SIP gateway to SipGate to make VoIP calls
Using prefix 9 before number.

Is it possible so that if I dial a number:

"0800 8000 8000"

that it will try to route the call over the first analogue line, if that 
fails/busy, goto analogue line 2, if that fails/budy then goto the SIP 
account, if for some reason this fails, or the net is down, then the "No 
lines available" is played.

Thanks.

Paul.
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Sorry about my previous post, "outbound routing" this was clearly
available in AMP.

However,

How would I go about making all calls from PSTN line 1 (X100P #1) ring
call group #1, PSTN line 2 (X100P #2) call group #2, and the SIP
incoming calls route to group #1 also. Is this done via dial plans? As
I can not see anything in AMP.

Cheers.