Jaicer

well there is no really invisible texture! you have to make it! well, i'll send you a package! i'll send you the download link! wait a minute!

and...the arf helmet...well, i cant isolate him from the other models! but i can try to find the one who send me the helmet! i'll contact you again!

and making the armor dirty and scretchy...edit it with gimp! add black-grey stripes and just try it! maybe you'll need some gimp tutorials! use google!