Mod Matrix says, essentially, WTH, so here it is:
Alpha Centauri cheat:
Optional first step: You can begin by setting all your bases to stockpile except one but this is not necessary although it is beneficial in some cases to gather energy.
Step 1: You have one of your best mineral bases begin assembling a project, large facility, or advanced and difficult to build weapon. Just pick the largest assignment possible so that it has a large amount of materials to build.
Step 2: Once this is only 1 turn from complete you open that base up. (Just before doing this you should order all your stockpiling bases to build something they need)
Step 3: You click on the Queue button (not the Change button) and simply click on cancel. This is the key to the whole flaw and it will not work if you do not do this.
Step 4: Now click on hurry for that item. It should have a small amount of credits of 2 or slightly above since it is only 1 turn till it is done. Do not click the accept button.
Step 5: It all comes together right here. You move your mouse over to one of the arrows that allow you to scroll through bases (The left or right button) while leaving the hurry dialog open.
Step 6: Now you are able to use this hurry command at any base and on any project. Find a base where you wish to do this. It will cost only the listed number of credits to do the hurry but it will do a great deal of hurrying for that cost and if everything was done right, it will finish off the item.
So basically, if your home base has a project that is 1 turn from complete and 2 credits to hurry to completion, you do the steps above and you can use this to complete every facility in every one of your bases for 2 credits apiece.
The key to this whole thing is that opening the queue and closing it does not lock the arrow buttons. This allows you to carry over this hurry to any base and use it on any assignment.