If you live in Montana, you probably will be able to.
On September 5, the ballot-qualified Constitution Party of Montana submitted its presidential elector candidates to the Secretary of State. The party informed the Secretary of State that its electors are pledged to Ron Paul for president and Michael Peroutka for vice-president. Ron Paul was aware that the party planned to do this, and has said that as long as he can remain passive and silent about the development, and as long as he need not sign any declaration of candidacy, that he does not object.
Oh, and if you live in Louisiana…
On September 4, a slate of presidential electors was filed at the Louisiana Secretary of State's office, in person. The electors are pledged to Ron Paul for president, and former Congressman Barry Goldwater, Jr., for vice-president. The partisan label for this slate is "Louisiana Taxpayers Party." The filing, and the $500 was accepted, but the Secretary of State did not commit to printing the slate on the ballot. However, there is no law that says presidential candidates at the November election must sign any declaration of candidacy.
That Potemkin party had offered the second place on the ballot to Lew Rockwell, who turned it down. Goldwater has accepted. While Paul eventually turned down the Independent Green Party's ballot access in Virginia, he hasn't rejected either of these states' ballot lines.
Also: That upcoming Paul press conference will feature both Bob Barr and Chuck Baldwin (who ended up snagging the Independent Green line). I haven't confirmed if Ralph Nader or Cynthia McKinney will be there, but neither has released a Wednesday schedule.