You can save the file locally as a smaller size graphic file.
That is, open it on your computer using Microsoft Photo Editor* or some other graphics program like photoshop. With the image opened for editing, on MPE's top toolbar use [ Image - Resize ] to reset it to a smaller size. Then save.

Then post that image somewhere so brickboard can use it. I've always put mine on my web space at comcast but there are plenty other places - maybe you can even upload it directly to brickboard somewhere.

* To open the image file with a specified program, you can right click (if using a windows computer) on the file, then select "Open with", then choose the program you want.
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Sven: '89 245 NA, 951 ECU, open-front airbox, E-fan, 205/65-15's, IPD sways, E-Codes, amber front corner reflectors. Wifemobile '89 245 NA stock. 90 244 NA spare, runs.