I will help you if you undertake NOT to dance naked at my wedding lol. I am a nearly newb at PSP8, but I will offer what help I can

.
There are temples provided by SL available on the website, and templates provided by Chip Midnight available from a link which is on this forum here:
/109/72/40762/1.htmlThere are separate templates for each type of clothing. You'll want the upper template.
You need to make a layer to work on, first, which automatically appears above the other layers. You can follow the outline of the body and arms for making the background garment. I am finding that although the templates seem to have seam allowances, I need to over shoot the outline a bit to ensure there are no nasty gaps. Sometimes these can't be seen on the preview either.
Seems to me there are two ways of putting something on the front of the T-shirt. You could drop an image which has a transparent surrounding onto the background on the same layer, or you could make a new layer.
To get a transparent surrounding, open up the pic in PSP, promote the image to a layer, then use the magic wand to select the background. If you then cut the background, you should be left with your image and a transparent background - depending upon how complex it is. You may have to select in several places to get rid of the background altogether, or you might decide it is all to much hassle and match the background on the image you have with the background colour of the t-shirt.
Centring the image up is a question of lining it up with the templates...Chip's have lines marked on them to show where the centre is.
Once you are happy with what you have, you need to hide all the guides by clicking in the eyes next to each layer, until you only have the work layer or layers visible. I would then merge the layers if you have more than one, make the mask for any transparency and then save the t-shirt design.
What I haven't discovered yet is how you put things across women's breasts without getting some element of distortion...also the middle of skirts. So if anyone has the answer to that question, please enlighten me!
Good luck
Cali