What I used is this:
Add:
PHP Code:
.spoiler {color: {firstaltcolor}; background: {firstaltcolor}};
to Head Insert, just right before </style>
for instructions on how to add the vbcode, click on the attachment.
however, one down side of this is that your alternating tables
must be of the same colour, if not, the tags on one table will look imbedded onto the forum, but on the other colour it'll show up oddly.
[for easy copying and pasting]
vB code tag: spoiler
vB code replacement: <b>Spoiler:</b> <font class=spoiler>{param}</font>
vB code example: [spoiler]Spoiler text[/spoiler]
vB code explanation: [anything you want]
Use {options}?: No