The directions for installing a rom on the A7 are clearly stated in the ElocityMod thread.... The one right next to the ElocityBlur thread.
// Begin Signature
HTC Evo 4G - S-OFF, Rooted Stock ROM
eLocity A7 - CyanogenMod7RC1
HTC Evo 3D - S-OFF, ZR-ICSense
Motorola Titianium i1x - 100% stock
Motorola Admiral - Rooted Stock ROM
HTC Evo View 4G - S-OFF, Rooted Stock HC
<-- The answer for all the questions you are about to ask.
// End Signature