Your best bet is to open an account with Photobucket at
Image hosting, free photo sharing & video sharing at Photobucket
Now once you've open the account and uploaded your files... lets say you wanted to post this picture:
you have a couple of ways you can do it...
When you are ready to post a picture, you need the address where the picture is located in your photobucket album. In a separate window (or tab) log into photobucket and view your album, select the photo you want to insert, in this case the picture of your car
See the boxes on the right (shown below)
left click on Share URL or Direct Link... you will get a yellow window that pops up and confirms the address has been copied
Now switch back to you posting screen on the forum that might look like this:
Now here is where we have a couple of options on how to insert the picture... one way is to use the "Insert Image" icon
in your screen which will bring up this screen
Highlight the Http:// then Right Click and select paste (or just CTRL V) ... the address will be inserted as shown below
Hit the enter key and your picture will post and you will see it in your posting as shown below
you can repeat this process in the posting for multiple images... NOW the other way to do it is to use img address on Photobucket... so back at photobucket...
Left click on IMG Code (you will get copied confirmation again)
now all you do is paste this address in your posting by again Right Click and select paste or simply CTRL V.... you will not see a picture like in the way shown above, you simply see the following text
For multiple pictures, just repeat for each picture... To view the picture(s)... simply click on Preview Post and you will see the picture(s)...
try both ways and see which way you prefer... this is as step by step as I could make it... hope it helps you out!