I dont have this receiver so i cant really help there. but your question about transponders.

there are around 90 transponders for sky uk, in fact here is the exact list.

[SATTYPE]
1=0282
2=28.2E

[DVB]
0=95
1=10714,H,22000,56,DVB-S,QPSK
2=10729,V,22000,56,DVB-S,QPSK
3=10744,H,22000,56,DVB-S,QPSK
4=10758,V,22000,56,DVB-S,QPSK
5=10773,H,22000,56,DVB-S,QPSK
6=10788,V,22000,56,DVB-S,QPSK
7=10803,H,22000,56,DVB-S,QPSK
8=10818,V,22000,56,DVB-S,QPSK
9=10832,H,22000,56,DVB-S,QPSK
10=10847,V,23000,89,S2,QPSK
11=10862,H,22000,56,DVB-S,QPSK
12=10876,V,22000,56,DVB-S,QPSK
13=10891,H,22000,56,DVB-S,QPSK
14=10906,V,22000,56,DVB-S,QPSK
15=10921,H,22000,56,DVB-S,QPSK
16=10936,V,22000,56,DVB-S,QPSK
17=10964,H,22000,56,DVB-S,QPSK
18=11052,H,22000,56,DVB-S,QPSK
19=11127,V,22000,23,S2,8PSK
20=11171,H,22000,56,DVB-S,QPSK
21=11222,H,27500,23,DVB-S,QPSK
22=11223,V,27500,23,DVB-S,QPSK
23=11259,V,27500,23,DVB-S,QPSK
24=11261,H,27500,23,DVB-S,QPSK
25=11307,H,27500,23,DVB-S,QPSK
26=11307,V,27500,23,DVB-S,QPSK
27=11343,V,27500,23,DVB-S,QPSK
28=11344,H,27500,23,DVB-S,QPSK
29=11389,H,27500,23,DVB-S,QPSK
30=11390,V,27500,23,DVB-S,QPSK
31=11426,H,27500,23,DVB-S,QPSK
32=11426,V,27500,23,DVB-S,QPSK
33=11469,H,27500,23,DVB-S,QPSK
34=11488,V,27500,23,DVB-S,QPSK
35=11508,H,27500,23,DVB-S,QPSK
36=11527,V,27500,23,DVB-S,QPSK
37=11546,H,27500,23,DVB-S,QPSK
38=11565,V,27500,23,DVB-S,QPSK
39=11585,H,27500,23,DVB-S,QPSK
40=11603,V,27500,23,DVB-S,QPSK
41=11623,H,27500,23,DVB-S,QPSK
42=11642,V,27500,23,DVB-S,QPSK
43=11661,H,27500,23,DVB-S,QPSK
44=11680,V,27500,23,DVB-S,QPSK
45=11719,H,29500,34,S2,QPSK
46=11740,V,29500,34,S2,QPSK
47=11758,H,29500,34,S2,QPSK
48=11778,V,27500,23,DVB-S,QPSK
49=11798,H,29500,34,S2,QPSK
50=11817,V,27500,23,DVB-S,QPSK
51=11836,H,27500,23,DVB-S,QPSK
52=11856,V,29500,34,S2,QPSK
53=11876,H,27500,23,DVB-S,QPSK
54=11895,V,27500,23,DVB-S,QPSK
55=11914,H,27500,23,DVB-S,QPSK
56=11934,V,27500,23,DVB-S,QPSK
57=11954,H,27500,23,DVB-S,QPSK
58=11973,V,27500,23,DVB-S,QPSK
59=11992,H,27500,23,DVB-S,QPSK
60=12012,V,29500,34,S2,QPSK
61=12032,H,27500,23,DVB-S,QPSK
62=12051,V,27500,23,DVB-S,QPSK
63=12070,H,27500,23,DVB-S,QPSK
64=12090,V,29500,34,S2,QPSK
65=12110,H,27500,23,DVB-S,QPSK
66=12129,V,27500,23,DVB-S,QPSK
67=12148,H,27500,23,DVB-S,QPSK
68=12168,V,29500,34,S2,QPSK
69=12188,H,29500,34,S2,QPSK
70=12207,V,27500,23,DVB-S,QPSK
71=12226,H,29500,34,S2,QPSK
72=12246,V,29500,34,S2,QPSK
73=12266,H,29500,34,S2,QPSK
74=12285,V,27500,23,DVB-S,QPSK
75=12304,H,27500,23,DVB-S,QPSK
76=12324,V,29500,34,S2,QPSK
77=12344,H,29500,34,S2,QPSK
78=12363,V,29500,34,S2,QPSK
79=12382,H,29500,34,S2,QPSK
80=12402,V,27500,23,DVB-S,QPSK
81=12422,H,27500,23,DVB-S,QPSK
82=12441,V,27500,23,DVB-S,QPSK
83=12460,H,29500,34,S2,QPSK
84=12480,V,27500,23,DVB-S,QPSK
85=12524,H,27500,23,DVB-S,QPSK
86=12524,V,27500,23,DVB-S,QPSK
87=12560,H,27500,23,DVB-S,QPSK
88=12560,V,27500,23,DVB-S,QPSK
89=12606,V,27500,34,S2,QPSK
90=12607,H,27500,23,DVB-S,QPSK
91=12643,H,27500,23,DVB-S,QPSK
92=12643,V,27500,23,DVB-S,QPSK
93=12688,H,22000,12,DVB-S,QPSK
94=12690,V,27500,23,DVB-S,QPSK
95=12726,V,27500,34,S2,QPSK
for a idea of what is on each transponder look here

Code:
http://en.kingofsat.net/pos-28.2E.php