Tom wants to know how to make a curved walkway with rectangular pavers.
You can simply fan out rectangular blocks, filling in the space with sand. The catch is that you cannot leave too large a space. The shorter the blocks, the easier it is to make the curve because larger blocks create larger spaces along the outside of the curve.
So with rectangular pavers, lay them with their short sides touching and fanning out, then the next row overlapping rather than matching the first row, for a tighter curve. To make serious curves, you need to either cut the rectangles into pie shaped pieces, or purchase matching pieces that are pie shaped. You can rough cut pavers with a guillotine type of cutter, and you can make neat precise cuts with a special masonry saw.