Hi there looking forward to doing this design for you but I have 2 questions before I start first of all as you said that you want a psd so to be sure I can do this in photoshop and also you asked the size to be 2880dpi is this correct.
Cheers Terry

Yea those are the specifications my supplier gave me for artwork to be printed by them.

The resolution of 2880 is the his printer resolution, you don't need to go any higher than 300 at the size you need.
Illustrator or vector files are resolution independent.

I would like to work on this but I can't illustrate.

Hi
I submitted a sketch and I'm waiting for some feedback.
Regards

Hi,
Thanks for your invitation.Can you please make the payment guaranteed so that we can participate in this contest.
Regards,
Smart Apps ART Team

hello dear contest holder,
please make sure for the resolution,
it was way too big,
for res 2880dpi , for plain file without any drawing in it was about 4gb.
please check one more time, and ask your man,
if you just want it on the tshirt, usually it is not more than 300dpi,
thank you,

Yea it turns out thats the resolution of his printer for photos so 300dpi is sufficient I''m not sure if a higher figure would give a slightly better result like 400dpi i''ll leave that to your discression as long as it prints well on the shirt i don''t mind