Thank you for both of your reponses and I will try and be clearer:
what I want to acheive is a HD motion graphic of text which will almost spin onto the screen letter my letter and then a become static word. Behind this I would like to place a moving image clip.
By 'basic cross image' what im looking to do is use a cruifix shape instead of a 't' on the text.
I hope this makes sense and thanks again!