Cabling Without a Cable Needle
Below are directions for working both a 2/2 Left Cross Cable (C4F) and a 2/2 Right Cross Cable (C4B) without a cable needle. This works best with grabby yarns like wool but, with practice, will work with any yarn and up to 6-stitch cables without too much difficulty. The main thing to remember is to secure the "floating stitches" by pinching them securely at their base between your thumb and index finger.
2/2 Left Cross Cable
Ready to Cable
Work up to the stitches that make up the cable
(c)2013 Impeccable Knits
2/2 Left Cross Cable Step 1
Push the tip of the Right Needle through the back of the third and the fourth stitches on the Left Needle
(c)2013 Impeccable Knits
2/2 Left Cross Cable Step 2
Pinch the first and second stitches on the Left Needle at their base to avoid any movement of yarn while the stitches are being rearranged and carefully pull the Left Needle tip out of only those first four stitches; the first two stitches will "float" until the next step
(c)2013 Impeccable Knits
2/2 Left Cross Cable Step 3
Keeping the Left Needle in front, push the Left Needle tip through the two "floating stitches"
(c)2013 Impeccable Knits
2/2 Left Cross Cable Step 4
Bring the Right Needle tip to meet the Left Needle tip and slide the two stitches from the Right Needle to the Left Needle
(c)2013 Impeccable Knits
2/2 Left Cross Cable Step 5
The four stitches involved in the cable have been arranged in the order they need to be in to work the 2/2 Left Cross (C4F) cable
(c)2013 Impeccable Knits
2/2 Left Cross Cable Step 6
Knit the four cable stitches and continued in pattern
(c)2013 Impeccable Knits
2/2 Right Cross Cable
Ready to Cable
Work up to the stitches that make up the cable
(c)2013 Impeccable Knits
2/2 Right Cross Cable Step 1
Push the tip of the Right Needle through the front of the third and the fourth stitches on the Left Needle
(c)2013 Impeccable Knits
2/2 Right Cross Cable Step 2
Pinch the first and second stitches on the Left Needle at their base to avoid any movement of yarn while the stitches are being 
(c)2013 Impeccable Knits
2/2 Right Cross Cable Step 3
Carefully pull the Left Needle tip out of only those first four stitches; the first two of those four stitches will "float" just until the next step
(c)2013 Impeccable Knits
2/2 Right Cross Cable Step 4
Keeping Left Needle to the back, push the Left Needle tip through the two "floating stitches"
(c)2013 Impeccable Knits
2/2 Right Cross Cable Step 5
Bring the Right Needle tip to meet the Left Needle tip and slide the two stitches from the Right Needle to the Left Needle; the four stitches have now been arranged in the order they need to be in to work the 2/2 Right Cross (C4B) cable
(c)2013 Impeccable Knits
2/2 Right Cross Cable Step 6
Knit the four cable stitches and continue in pattern
(c)2013 Impeccable Knits