Howdy!

Big project there!

The default is Linux24 which will init the Linux 24 Label, Kernel, and append lines and no other.

If you change the default at the top of the list, the boot will default to the new label, kernel and append that you desire from the remaining items on the listing.

These options are made at boot time, either by naming them specifically at boot time, or by letting the default selection prevail after the wait time set by the TIMEOUT entry.

Thus, to select the kernel linux26 as default, delete the Linux24 from the default line and insert linux26.

At boot time, linux24 could then be selected before the timeout occurs if desired. This reverses the original arrangement with Linux24 as default.

Best of luck!!